High Quality Content by WIKIPEDIA articles! Super-Kamiokande, or Super-K for short, is a neutrino observatory in the city of Hida, Gifu Prefecture, Japan. The observatory was designed to search for proton decay, study solar and atmospheric neutrinos, and keep watch for supernovas in the Milky Way Galaxy. The Super-K is located 1,000 m (3,281 ft) underground in Kamioka Mining and Smelting Co.'s Mozumi Mine in Hida's Kamioka area. It consists of a cylindrical stainless steel tank that is 41.4 m (135.8 ft) tall and 39.3 m (128.9 ft) in diameter holding 50,000 tons of ultra-pure water. The tank volume is divided by a stainless steel superstructure into an inner detector (ID) region that is 33.8 m (110.9 ft) in diameter and 36.2 m (118.8 ft) in height and outer detector (OD) which consists of the remaining tank volume. Mounted on the superstructure are 11,146 photomultiplier tubes (PMT) 20 in (50.8 cm) in diameter that face the ID and 1885 8 in (20.3 cm) PMTs that face the OD. There is a Tyvek and blacksheet barrier attached to the superstructure that optically separates the ID and OD.

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